Well, before Mike and Uncle Buck take this thread completely over my head, I'd like to chime in.
Product improvements in tractors, incremental or otherwise, can be a very big deal if you have to work a 10-12 hour high-pressure day on a tractor for days on end. A cab with air can keep you fresh enough to avoid costly mistakes. Power shift can mean a real increase in productivity. 4WD makes tight uphill turns on steep hillsides a non-event compared to braking-clutching nail biters with 2WD. Simple things like placement of the hydraulic controls or the angle at which you have to push them will determine whether the bursitis flares up or the shoulder feels fine.
Most here don't work those kind of days on their CUTs, neither do I. So "big iron" improvements that are transferred to a CUT can appear to lack purpose.
But with Ag machines, they can be the whole story. The improvements can determine whether the job gets finished in the available window, whether damage is incurred in the process, whether time is lost due to equipment issues, whether the operator/owner comes to love or detest the machine, and whether the balance sheet reflects profit or loss. As a result the Ag manufacturers are in heated competition to deliver products that are as efficient, comfortable, reliable and capable as possible.
The skills and abilities obtained in this quest, especially if they give Brand X a notable advantage, will naturally filter down to design of lesser products such as CUTs. If it helps Brand X sell a few more machines, why not? The cost of design and development will be spread over a wider base....and who knows what feature might really "take off" for a certain CUT application.
We should be thankful this process continues. No one is forcing us to buy the latest and greatest; basic tractors continue to be offered by every manufacturer. Yet the "Deluxe" lines are continually updated. It could be that an improvement that you now greet with derision will be what keeps you in the tractorin' game a decade or two down the road. Much of what's now taken for granted on a modern Ag tractor, got its start the same way.
As good as the old JD4440 was; when under the gun, I'll choose a NH TM or a Case MX any day....that much I know.
FWIW
Bob